EP 0847612 B1 20010418 - METHOD AND DEVICE FOR COMPENSATION OF REACTIVE POWER
Title (en)
METHOD AND DEVICE FOR COMPENSATION OF REACTIVE POWER
Title (de)
VERFAHREN UND EINRICHTUNG ZUR BLINDLEISTUNGSKOMPENSATION
Title (fr)
PROCEDE ET DISPOSITIF DE COMPENSATION DE LA PUISSANCE REACTIVE
Publication
Application
Priority
- SE 9701005 W 19970609
- SE 9602368 A 19960617
Abstract (en)
[origin: WO9749157A1] A device for compensation of the reactive power consumption of an industrial load (2), preferably an electric arc furnace or a plant for rolling of metallic materials, supplied from a three-phase (a, b, c) electric ac network (1), comprises a first compensation device (3) for controllable consumption of reactive power and a second compensation device (4) for generation of reactive power. The first compensation device comprises an inductor (31) connected in series with a semiconductor connection (32) controllable in dependence on a control order ( alpha ref) supplied thereto. Control equipment (7) is supplied with measured values of voltage (Ua, Ub, Uc) and current (Ia, Ib, Ic), respectively, at the load. The control equipment comprises means (8) for determination of the instantaneous consumption of active (P(t)) and of reactive power (Q(t)) by the load, and a control device (9) which forms the control order to the first compensation device in dependence on the consumption of reactive power and active power by the load.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H02J 3/1864 (2013.01 - EP US); Y02E 40/10 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9749157 A1 19971224; CN 1099744 C 20030122; CN 1195428 A 19981007; DE 69704602 D1 20010523; DE 69704602 T2 20011122; EP 0847612 A1 19980617; EP 0847612 B1 20010418; JP H11511960 A 19991012; SE 515107 C2 20010611; SE 9602368 D0 19960617; SE 9602368 L 19971218; US 6114841 A 20000905
DOCDB simple family (application)
SE 9701005 W 19970609; CN 97190723 A 19970609; DE 69704602 T 19970609; EP 97928576 A 19970609; JP 50277698 A 19970609; SE 9602368 A 19960617; US 87403597 A 19970612